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Canvas [ | Question 19 In an experiment, the researcher randomly aésigns method is being used to control participant age? O stratified random sampling (© non-probablity sampling (O simple random sampling O non-guota sampling [ > | Question 20 The tendency for individuals who have extreme scares (high or low) on one measurement and to have less extreme scores on a second measurement is called (O instrumentation (O maturation () history (O regression toward the mean Question 21 What additional information is obtained by measuring on an interval scale as compared to an ordinal scale? () which measure is the most accurate (0 whether the measurements are the same or different () the direction of the differences () the size of the differences